Self-starting figure-9 cavity lasers based on external signal injection

Abstract

The present disclosure relates to a self-starting figure-9 cavity laser based on external signal injection. The laser includes a nonlinear amplifying loop mirror, a linear arm, and a 2×2 polarization-maintaining fiber coupler. The laser further includes an external optical signal source, a 3-port polarization-maintaining fiber circulator, a photodetector, and a control module. A first port and a second port of the 2×2 polarization-maintaining fiber coupler are connected to the linear arm and a second port of the 3-port polarization-maintaining fiber circulator, respectively. A third port and a fourth port of the 2×2 polarization-maintaining fiber coupler are connected to the nonlinear amplifying loop mirror. A first port and a third port of the 3-port polarization-maintaining fiber circulator are connected to the external optical signal source and the photodetector, respectively. The control module is connected to the nonlinear amplifying loop mirror, the external optical signal source, and the photodetector.

Dependencies are inferred from the claim text.